[Paraview] no improvement while using in parallel

[David E DeMarle]

First post the "Tools->Timer Logs"

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Wed, Jan 23, 2013 at 10:34 AM, Utkarsh Ayachit
<utkarsh.ayachit at kitware.com> wrote:
> Is it possible to share the data (feel free to share that off the
> list). It may be easier to diagnose the problem that way.
>
> Utkarsh
>
> On Tue, Jan 22, 2013 at 11:46 AM, Kevin Hackel <kevin.hackel at online.de> wrote:
>> Hello all,
>>
>> I’m trying to use paraview in parallel. For that I’ve got a self-compiled
>> paraview version 3.14 and I use client/server mode.
>> In paraview I use these settings: use multicore, remote render threshold
>> (100MByte), client outline threshold (0MByte) and interactive subsample rate
>> (2pixels).
>>
>> I’ve got unstructered test data. The data was created in four processes as
>> *.vtu file (4times 352MByte) or as a whole *.pvtu file.
>>
>> So I start with ssh the pvservers on the server (there are 48cores on the
>> server) with
>> mpirun –np ‘number’ ../pvserver –display localhost:0
>> and then I connect via my PC to this server (there’s a ethernet cable with
>> 1GB/s between server and PC).
>>
>> I tried different numbers of pvservers (2,4,8 and 16).
>> I loaded the data and used different filters like wireframe, contour, slice
>> and clip and I moved the data around (with drag and drop).
>>
>> But I could only see a little improvement in the time of representation
>> (e.g. the contour filter took 5.3s on 4pvservers and 5s on 16pvservers).
>> I thought I could see a greater improvement.
>>
>> So why do I see no improvement or when can I see an improvement? Or am I
>> doing something wrong?
>>
>> Also I’m surprised that it took lesser than 4 times as long when I use the
>> whole data in compare with only a fourth of the data.
>> e.g. on 16 pvservers it took 6s to change the representation of a fourth of
>> the data to wireframe and it took 20s for the whole data
>> Why is this happening?
>>
>> Thank you for your help.
>>
>>
>> Greetings,
>> Kevin
>>
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> _______________________________________________
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>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>
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